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Name_____________________________________________________________________________ Per____ Notes: What is Living? & Cell Introduction Characteristics of Life All life has seven characteristics in common: – Living things are made of cells. (ex. – Living things maintain their internal environment. (ex. – Living things pass on their traits. (ex. – Living things perform chemical activities. This is known as metabolism. (ex. – Living things grow and develop. (ex. – Living things respond to a stimulus. (ex. – Living things reproduce. (ex. The Cell Theory 1. All _____________ things are ___________________ of cells. 2. Cells are the basic units of __________________ and ___________________ in living things. 3. ______ cells are produced from ________________ cells. Cells Timeline Robert Hooke (1665): studied cork; saw tiny, regular shaped “boxes”; called them _______. Matthais Schleiden (1838)- All __________ are made of cells Theodor Schwann (1839)- All ___________ are made of cells Rudolf Virchow (1855)- Concluded _____________________________________________________________ Viruses & Disease Viruses are 1/1000 to 1/10,000 the size of our cells. What is a Virus? – classified as ______________________ 1. 2. 3. 4. Viruses consist of 2 structures: 1. 2. Cell Types There are two categories of cells: Eukaryotic – EX Prokaryotic -EX - ENDOSYMBIOTIC THEORY Two specific organelles have made Eukaryotic cells be the most successful…. Mitochondria – Chloroplast - These two organelles (______________________ and _______________________) are thought once be their own prokaryotic cell living inside a larger host cell…….these “prokaryotes” provided nutrients/oxygen to the host and in turn got a safe place to live. Eventually they became organelles and the “host” cell became a eukaryotic cell. Chloroplast have DNA Mitochondria have DNA Plant vs. Animal Cells Organelles found only in plants: Organelles found only in animal cells: Organelles- _____________________ structures in a cell that have a specific ___________________.